创建Conda环境时出现simplejson ImportError问题求助

问题详情 #

在HPC集群执行conda create -n krak_brack创建新Conda环境时，出现如下错误：

/cluster/home/2530631/mambaforge/lib/python3.10/site-packages/_distutils_hack/__init__.py:33: UserWarning: Setuptools is replacing distutils.
  warnings.warn("Setuptools is replacing distutils.")

# >>>>>>>>>>>>>>>>>>>>>> ERROR REPORT <<<<<<<<<<<<<<<<<<

    Traceback (most recent call last):
      File "/cluster/home/2530631/mambaforge/lib/python3.10/site-packages/conda/exceptions.py", line 1118, in __call__
        return func(*args, **kwargs)
      File "/cluster/home/2530631/mambaforge/lib/python3.10/site-packages/conda/cli/main.py", line 69, in main_subshell
        exit_code = do_call(args, p)
      File "/cluster/home/2530631/mambaforge/lib/python3.10/site-packages/conda/cli/conda_argparse.py", line 89, in do_call
        module = import_module(relative_mod, __name__.rsplit('.', 1)[0])
      File "/cluster/home/2530631/mambaforge/lib/python3.10/importlib/__init__.py", line 126, in import_module
        return _bootstrap._gcd_import(name[level:], package, level)
      File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
      File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
      File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
      File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
      File "<frozen importlib._bootstrap_external>", line 883, in exec_module
      File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
      File "/cluster/home/2530631/mambaforge/lib/python3.10/site-packages/conda/cli/main_create.py", line 14, in <module>
        from ..notices import notices
      File "/cluster/home/2530631/mambaforge/lib/python3.10/site-packages/conda/notices/__init__.py", line 3, in <module>
        from .core import notices  # noqa: F401
      File "/cluster/home/2530631/mambaforge/lib/python3.10/site-packages/conda/notices/core.py", line 15, in <module>
        from . import fetch
      File "/cluster/home/2530631/mambaforge/lib/python3.10/site-packages/conda/notices/fetch.py", line 8, in <module>
        import requests
      File "/cluster/home/2530631/mambaforge/lib/python3.10/site-packages/requests/__init__.py", line 45, in <module>
        from .exceptions import RequestsDependencyWarning
      File "/cluster/home/2530631/mambaforge/lib/python3.10/site-packages/requests/exceptions.py", line 9, in <module>
        from .compat import JSONDecodeError as CompatJSONDecodeError
      File "/cluster/home/2530631/mambaforge/lib/python3.10/site-packages/requests/compat.py", line 40, in <module>
        from simplejson import JSONDecodeError
    ImportError: cannot import name 'JSONDecodeError' from 'simplejson' (unknown location)

当前使用的Conda/Mamba相关版本：

# Name                    Version                   Build  Channel
conda                     22.11.1         py310hff52083_1    conda-forge
conda-package-handling    2.0.2              pyh38be061_0    conda-forge
conda-package-streaming   0.7.0              pyhd8ed1ab_1    conda-forge
fonts-conda-ecosystem     1                             0    conda-forge
fonts-conda-forge         1                             0    conda-forge
libmamba                  1.0.0                h9eff5f0_2    conda-forge
libmambapy                1.0.0           py310hd5a56e8_2    conda-forge
mamba                     1.0.0           py310h51d5547_2    conda-forge
python                    3.10.6          ha86cf86_0_cpython    conda-forge
python_abi                3.10                    3_cp310    conda-forge
requests                  2.28.2             pyhd8ed1ab_0    conda-forge
setuptools                66.1.1             pyhd8ed1ab_0    conda-forge

解决方案 #

1. 强制重装simplejson包 #

问题根源是requests依赖的simplejson包出现损坏或版本不兼容，先在base环境中重装指定版本：

conda install -n base simplejson=3.17.6 -c conda-forge --force-reinstall

如果使用mamba：

mamba install -n base simplejson=3.17.6 -c conda-forge --force-reinstall

2. 升级核心依赖包 #

升级base环境中的conda和requests，确保依赖版本兼容：

conda update -n base conda requests -c conda-forge

或用mamba：

mamba update -n base conda requests -c conda-forge

3. 临时禁用Conda notices功能（应急方案） #

错误触发于加载notices模块，可临时绕过该功能创建环境：

CONDA_NOTICES=false conda create -n krak_brack

若需永久禁用（不推荐）：

conda config --set show_notices false

4. 重新初始化Conda/Mamba #

若上述方法无效，尝试重置conda初始化：

conda init --reverse
conda init bash  # 根据你的shell类型替换为zsh等

重启shell后再尝试创建环境。

内容的提问来源于stack exchange，提问作者Riksal96